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参数资料
| 型号： | A6261KLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 11/19页 |
| 文件大小： | 0K |
| 描述： | IC LED ARRAY DVR 400MA 16-TSSOP |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 线性（LDO），PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 电源电压： | 6 V ~ 50 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 其它名称： | 620-1360-6 |
A6261
Protected LED Array Driver
Application Information
Power Dissipation
The most critical design considerations when using a linear regu-
lator such as the A6261 are the power produced internally as heat
and the rate at which that heat can be dissipated.
There are three sources of power dissipation in the A6261:
? The quiescent power to run the control circuits
? The power in the reference circuit
? The power due to the regulator voltage drop
Note that the voltage drop across the regulator, V REG , is always
greater than the specified minimum drop-out voltage, V DO . The
output current is regulated by making this voltage large enough
to provide the voltage drop from the supply voltage to the total
forward voltage of all LEDs in series, V LED .
The total power dissipated in the A6261 is the sum of the qui-
escent power, the reference power, and the power in each of the
four regulators:
The elements relating to these dissipation sources are illustrated
in figure 4.
Quiescent Power The quiescent power is the product of the
quiescent current, I INQ , and the supply voltage, V IN , and is not
related to the regulated current. The quiescent power, P Q , is there-
fore defined as:
P Q = V IN × I INQ (5)
Reference Power The reference circuit draws the reference
current from the supply and passes it through the reference resis-
tor to ground. The reference current is 8% of the output current
on any one active output. The reference circuit power is the prod-
uct of the reference current and the difference between the supply
voltage and the reference voltage, typically 1.2 V. The reference
P DIS = P Q + P REF
+ P REGA + P REGB + P REGC + P REGD
The power that is dissipated in each string of LEDs is:
P LEDx = V LEDx × I LEDx
where x is A, B, C, or D, and V LEDx is the voltage across all
LEDs in the string.
VIN
A6261
(8)
(9)
power, P REF , is therefore defined as:
I LAx
V REG
P REF =
( V IN – V REF ) × V REF
R REF
(6)
LAx
Regulator Power In most application circuits the largest dis-
sipation will be produced by the output current regulators. The
power dissipated in each current regulator is simply the product
of the output current and the voltage drop across the regulator.
V IN
IREF
I REF
I INQ
V LED
The total current regulator dissipation is the sum of the dissipa-
tion in each output regulator. The regulator power for each output
V REF
R REF
is defined as:
GND
P REGx = ( V IN – V LEDx ) × I LEDx
where x is 1, 2, 3, or 4.
(7)
Figure 4. Internal power dissipation sources.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| A6261KLYTR-T | 功能描述:IC LED ARRAY DVR 400MA 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| A6262 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A6262 is a linear, programmable current regulator providing up to 100 mA from each of four outputs to drive arrays of high brightness LEDs. |
| A6262KLPTR-T | 功能描述:IC LED ARRAY DRIVER AUTO 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 恒定电流:- 恒定电压:- 拓扑:升压（升压），切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:625kHz ~ 875kHz 电源电压:2.7 V ~ 5.3 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-µMAX 包装:带卷 (TR) 工作温度:-40°C ~ 85°C |
| A6262KLYTR-T | 功能描述:IC LED ARRAY DRIVER AUTO 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| A6263 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:Protected LED Array Driver |
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